flutter_launcher_icons not working Unhandled exception: FormatException: Invalid number (at character 1)

Question

I want to change my app icon in flutter using flutter_launcher_icons: ^0.9.2
It shows me errors while I'm running Command flutter pub run flutter_launcher_icons:main
Image of the error

I tried many times but no new results

Answer 1

I just had the same problem and solved doing this in android/app/build.gradle.

Changed:

minSdkVersion flutter.minSdkVersion
targetSdkVersion flutter.targetSdkVersion

To:

minSdkVersion 26
targetSdkVersion 30

Source

[Edit] After that, I could not run on emulator, so I changed back the gradle file (without running flutter_launcher_icon again). Now I have the app running and the icons are right.

Answer 2

Thanks to this answer, I was able to fix the issue!